The Beatles legend opened up in an interview with The New Yorker after being asked what he thought about the group in comparison to his band.
"I'm not sure I should say it, but they're a blues cover band, that's sort of what the Stones are," he mused. "I think our net was cast a bit wider than theirs."
It's not the first time McCartney has taken aim at the Stones. Back in April 2020, the singer told Howard Stern that The Beatles were superior to the Rolling Stones, adding, "They are rooted in the blues. When they are writing stuff, it has to do with the blues. We had a little more influences... There's a lot of differences and I love the Stones, but I'm with you. The Beatles were better."
Mick Jagger later responded on Zane Lowe's Apple Music show, insisting that "there's obviously no competition" between the two bands.
"The big difference, though, is, and sort of slightly seriously, is that the Rolling Stones is a big concert band in other decades and other areas when the Beatles never even did an arena tour, or Madison Square Garden with a decent sound system," he said. "They broke up before that business started, the touring business for real."
"That's the real big difference between these two bands. One band is unbelievably luckily, still playing in stadiums and then the other band doesn't exist."